Question 28.
Which of the following statement is true for acids?
(a) Bitter and change red litmus to blue
(b) Sour and change red litmus to blue
(c) Sour and change blue litmus to red
(d) Bitter and change blue litmus to red

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Solution

Acids are those chemical substances which have a sour taste and turn blue litmus solution to red. On the other hand, bases are bitter in taste and soapy to touch and turn red litmus solution to blue.

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Q. Which of the following statement is true for acids?
(a) Bitter and change red litmus to blue
(b) Sour and change red litmus to blue
(c) Sour and change blue litmus to red
(d) Bitter and change blue litmus to red

Q. Consider the following statements:
1) Acids are sour in taste and change the colour of blue litmus to red.
2) Bases are bitter and change the colour of red litmus to blue.
3) Litmus is a natural indicator.
Which of the statements above are correct?

Choose the correct option regarding the statements given below:

Statement 1: Blue litmus changes into red in acidic medium.
Statement 2: Red litmus changes into blue in basic medium.
Statement 3: Blue litmus changes into red in basic medium.
Statement 4: Red litmus changes into blue in acidic medium.

Q. Bases change blue litmus to red.

Q. What do we observe on pouring acetic acid on red blue litmus papers ?
(a) Red litmus remains red and blue litmus turns red.
(b) Red litmus turns blue and blue litmus remains blue.
(c) Red litmus turns blue and blue litmus turns red.
(d) Red litmus becomes colourless and blue litmus remains blue.

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Universal Indicator

Standard X Chemistry

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Question 28. Which of the following statement is true for acids? (a) Bitter and change red litmus to blue (b) Sour and change red litmus to blue (c) Sour and change blue litmus to red (d) Bitter and change blue litmus to red

Acids are those chemical substances which have a sour taste and turn blue litmus solution to red. On the other hand, bases are bitter in taste and soapy to touch and turn red litmus solution to blue.

Question 28.
Which of the following statement is true for acids?
(a) Bitter and change red litmus to blue
(b) Sour and change red litmus to blue
(c) Sour and change blue litmus to red
(d) Bitter and change blue litmus to red